Believers, adopted sons, now have the righteousness of God in Christ based upon the work of the Saviour, the Lord Jesus Christ, alone.
I am pretty sure that you are claiming True Christians, believers and adopted sons, do not sin because they have the righteousness of Christ in them.
If so, there seems to be a great hole in your perspective because of ignorance about the lives of legitimate sons in Christ. Legitimate sons are trained in righteousness by the painful chastisements from GOD. In fact if you are not painfully chastised you can bet you are an illegitimate son, a Cain. Now, does GOD chastise us for our righteous acts? No of course not, HE chastises us for our failures to be righteous, our sins, our missing the mark of righteousness. Does this mean that Christ's righteousness is fake and doesn't meet the requirement of true righteousness? Of course not, it just means His righteousness in us does one job but not the job or training our newly returned free will (returned by our re-birth). Christ's righteousness overshadowed our sinfulness so GOD in the Holy Spirit could work with us while sinners which HE usually cannot abide. Then the work HE does with us is bit by bit, the small successes and failures of our choices by our free will which are rewarded and chastised so that we learn to choose righteousness by our own free will so we will never choose sin again and we are heaven
ready.
If you are still reading, here is the scripture that teaches this doctrine:
Heb 12:5 And have you completely forgotten this word of encouragement that addresses you as a father addresses his son? This is addressed to HIS sons, ie believers, ie converts, ie the born again:
It says,
“My son, do not make light of the Lord’s discipline,
and do not lose heart when he rebukes you, Rebuke is to reprove, rebuke, discipline, to expose,
show to be guilty. If they are totally righteous in Christ then how can these sons be shown to be guilty??
6 because the Lord disciplines the one he loves,
and he chastens everyone he accepts as his son.” Chasten is
'to scourge,' properly, to whip (scourge) with a mastigos (a cat o' nine tails); to "flog (scourge) a victim strapped to a pole or frame" Wow, this doesn't sound like HE is holding back at all does it? Do you think you may have accidently missed your discipline? This doesn't sound like something you can ignore and forget about, eh?
7 Endure hardship as discipline; God is treating you as his children. For what children are not disciplined by their father? 8 If you are not disciplined—and everyone undergoes discipline—then you are not legitimate, not true sons and daughters at all. In your walk with Christ after your rebirth, have you been figuratively whipped by a nine lash whip with bits of sharp metal sown into the strips? NO? Then are you indeed legitimate? Claim the blood of Christ all you want - what HE demands in your own righteousness by our own free will and if you are legitimate HE will fulfill that in you no matter how much it costs you and HIM.
9 Moreover, we have all had human fathers who disciplined us and we respected them for it. How much more should we submit to the Father of spirits and live! 10 They disciplined us for a little while as they thought best; but God disciplines us for our good, in order that we may share in his holiness. 11 No discipline seems pleasant at the time, but painful. Painful = pain, grief, sorrow, affliction. Believe it...every legitimate Christian feels this pain over their sins until they learn to never choose sin again.
Later on, however, it produces a harvest of righteousness and peace for those who have been trained by it. If the righteousness of Christ is all we need, then this righteousness is a waste of pain which equates to torture, causing pain for no purpose.
